• Login
    • Join
  • FOLLOW:
  • Subscribe Free
    • Magazine
    • eNewsletter
    Checkout
    • Magazine
    • News
    • Opinions
    • Top 30
    • Research
    • Supply Chain
    • Device Sectors
    • Directory
    • Events
    • Resources
    • Microsites
    • More
  • Magazine
  • News
  • Opinions
  • Top 30
  • Research
  • Supply Chain
  • Device Sectors
  • Directory
  • Events
  • Resources
  • Microsites
  • Current / Back Issues
    Features
    Editorial
    Digital Edition
    eNewsletter Archive
    Our Team
    Editorial Guidelines
    Reprints
    Subscribe Now
    Advertise Now
    Top Features
    Seeking a Revolution in Clinical Care Through AI

    Diversifying Supply Chains: New Opportunities Post Pandemic and After Brexit

    Addition by Subtraction: The Latest of Machining for Medtech

    Innovation Incubators: An R&D Roundtable

    Virtual Allies: Electronics Manufacturing Services Providers Offer Real Solutions
    OEM News
    Supplier News
    Service / Press Releases
    Online Exclusives
    Press Releases
    People in the News
    Product & Service Releases
    Supplier News
    Medtech Makers
    Technical Features
    International News
    Videos
    Product & Service Releases
    Live From Shows
    Top News
    Plastikos Medical Begins Phase II of Expansion

    Ready Robotics Hires Proven Automation Leaders

    Philips, Disney Join Forces to Reduce Childrens' MRI Anxiety

    FDA OKs Asensus' Senhance for General Surgery

    Boston Scientific to Buy Lumenis' Surgical Biz for $1B
    From the Editor
    Blogs
    Guest Opinions
    Top Opinions
    Seeking a Revolution in Clinical Care Through AI

    Diversifying Supply Chains: New Opportunities Post Pandemic and After Brexit

    Addition by Subtraction: The Latest of Machining for Medtech

    Innovation Incubators: An R&D Roundtable

    Virtual Allies: Electronics Manufacturing Services Providers Offer Real Solutions
    Top 30 Medical Device Companies
    Market Data
    White Papers
    Top Research
    Role and Benefits of Plastics in the COVID-19 Vaccine Rollout

    Six Questions to Consider in Developing a Home Healthcare Device

    Five Themes to Watch as Digital Health Takes Center Stage

    Rethink Your Medtech ASC Strategy, Part 1

    Pandemic-Level Playing Field: How COVID-19 Made Space for Progress
    3D/Additive Manufacturing
    Contract Manufacturing
    Electronics
    Machining & Laser Processing
    Materials
    Molding
    Packaging & Sterilization
    R&D & Design
    Software & IT
    Testing
    Tubing & Extrusion
    Cardiovascular
    Diagnostics
    Digital Health
    Neurological
    Patient Monitoring
    Surgical
    Orthopedics
    All Companies
    Categories
    Company Capabilities
    Add New Company
    Outsourcing Directory
    K-Tube Technologies

    PTI Engineered Plastics Inc.

    Creganna Medical, part of TE Connectivity

    Spectrum Plastics Group

    MW Life Sciences
    MPO Summit
    Industry Events
    Webinars
    Live From Show Event
    Industry Associations
    Videos
    Career Central
    eBook
    Slideshows
    Top Resources
    How Grant Funding Works and How It Can Help

    Refurbished Medical Equipment Testing and Certification Under the NEC

    Taking the First Step with Metal Components

    4 Trends Driving Medical Manufacturing in 2021

    Pioneering AI Solutions to Reinforce Healthcare Services
    Companies
    News Releases
    Product Releases
    Press Releases
    Product Spec Sheets
    Service Releases
    Case Studies
    White Papers
    Brochures
    Videos
    Outsourcing Directory
    Spectrum Plastics Group

    K-Tube Technologies

    Creganna Medical, part of TE Connectivity

    FUTEK Advanced Sensor Technology Inc.

    Unicep
    • Magazine
      • Current/Back Issues
      • Features
      • Editorial
      • Columns
      • Digital Editions
      • Subscribe Now
      • Advertise Now
    • News
    • Directory
      • All Companies
      • ALL CATEGORIES
      • Industry Associations
      • Company Capabilities
      • Add Your Company
    • Supply Chain
      • 3D/Additive Manufacturing
      • Contract Manufacturing
      • Electronics
      • Machining & Laser Processing
      • Materials
      • Molding
      • Packaging & Sterilization
      • R&D & Design
      • Software & IT
      • Testing
      • Tubing & Extrusion
    • Device Sectors
      • Cardiovascular
      • Diagnostics
      • Digital Health
      • Neurological
      • Patient Monitoring
      • Surgical
      • Orthopedics
    • Top 30 Company Report
    • Expert Insights
    • Slideshows
    • Videos
    • Podcasts
    • Resources
    • eBook
    • Infographics
    • Whitepapers
    • Research
      • White Papers
      • Case Studies
      • Product Spec Sheets
      • Market Data
    • MPO Summit
    • Events
      • Industry Events
      • Live From Show Events
      • Webinars
    • Microsite
      • Companies
      • Product Releases
      • Product Spec Sheets
      • Services
      • White Papers / Tech Papers
      • Press Releases
      • Videos
      • Literature / Brochures
      • Case Studies
    • About Us
      • About Us
      • Contact Us
      • Advertise with Us
      • eNewsletter Archive
      • Privacy Policy
      • Terms of Use
    Online Exclusives

    How to Improve ECG Rhythm Recognition Using a DCNN

    Comparing and contrasting methods of quality enhancement.

    How to Improve ECG Rhythm Recognition Using a DCNN
    Related CONTENT
    • FDA Breakthrough Device Designation Awarded to BrainCool AB's Cooral System
    • FDA Green Lights EPI's EndoClot Hemostat to Manage GI Bleeding
    • Rice University Researchers Receive Funding to Develop Covid-19 Sensor System
    • Suitcase Laboratory to Detect COVID-19 in Development
    • First Use of SoundBite Medical's Active Wire to Treat Calcified Below-The-Knee CTOs
    Sergey Kuznetsov, Software Engineer, Auriga07.06.20
    Recently, I published a piece on recognizing ECG rhythms using a deep convolutional neural network (DCNN). The article argues that the reliable recognition of certain heart rhythm pathologies can be performed based on the monitored recordings of two to three patients with that pathology. In this article, the same DCNN and data were used to demonstrate that recognition can be improved by both neural network reconfiguration and input data enhancement.
     
    This article describes three methods of quality enhancement I have investigated:
     
    • Data split interval adjustment.
    • The “transfer learning” method.
    • Balancing classes.
     
    The transfer learning method is based on the assumption that the features of a neural network that have been trained to extract data from a large bulk of data labeled for a task would be suitable for solving another task, usually with less data. Before reducing the number of trainings, the weights for the final layers are cleared. When there is a task that has a different number of classes, the parameters of the final layer are changed.
     
    The task in the review used the same 16-layer convolutional neural network and the same freely available ECG data from one lead (mitdb) discussed in the previous article. Additionally, the labeled data of the 2017 competition published on physionet.org was used where training was held for four classes on ECG implementations lasting 9–60 seconds. For the possibility of joint use, the source data (360 samples per second) were resampled into the input rate of additional data (300 samples per second).
     
    The following describes the application of the three abovementioned methods of input data enhancement for the two versions of the classification task discussed in the previous article (with/without the separation of training data and test data). The version without separation used methods (1) and (2). For the separation option, methods (1), (2), and (3) were used.
     
    1. Data Split Interval Adjustment
    As expected, splitting data into five-second intervals instead of 10-second intervals (method 1) led to a relative decrease in the quality of recognition of atrial fibrillation (AFIB); however, previously unrecognized NOD and IVR rhythms were added. This can be explained by a decrease in data snippet losses, which is particularly important for classes with a small amount of data. The overall index for "ranking-based average precision" (RBAP) increased from 0.968 to 0.975.
     
    Reducing the length of the implementation at the input of the neural network led to its inoperability. This was offset by changing the parameters of the first layer (1D-convolution): the size of the convolution kernel was halved and the stride was reduced from three to two.
     
    To improve the result, “transfer learning” (method 2) with a variable number of erasable layers was implemented. RBAP increased to 0.984 and in this case, it was optimal to erase the weights of not only one or two layers but 10–13 out of the 16 layers (Figure 1).


    Figure 1.

    2. The “Transfer” Learning Method
    Leaping ahead, this “fair and square” option is the only valuable one for practical use. Splitting data into five-second intervals (method 1) resulted in IVR rhythm recognition addition and an RBAP increase from 0.804 to 0.826. The method of “transfer learning” (method 2) with the erasure of the weights of ten layers (optimal for this option) added AFL rhythm recognition and RBAP was increased to 0.885.
     
    Significant results were only obtained for six recognizable rhythm classes using “learning transfer”; these are presented in Table 1:
     
    Classification report   Confusion matrix
    Precision Recall f1-score support rhythm N AFIB P B AFL IVR
    0.98 0.98 0.98 342 N 334 8 0 0 0 0
    0.90 0.83 0.86 260 AFIB 4 215 0 1 40 0
    1.00 0.99 1.00 638 P 0 1 632 0 0 5
    0.96 0.83 0.89 58 B 0 0 0 48 0 1
    0.76 0.95 0.84 132 AFL 0 0 0 1 125 0
    0.87 0.95 0.91 42 IVR 2 0 0 0 0 40
     
    0.95 1472 Accuracy
    0.91 0.92 0.91 1472 Macro average
    0.95 0.95 0.95 1472 Weighted average
    0.973       Ranking-based average precision (RBAP)

    3. Balancing Classes
    The attempt to use all realizations (nine rhythm classes) that resulted from splitting data for training and to use the alignment of classes by the number of copies previously used by decimation was unsuccessful; the significant differences in class capacities may be to blame. Both direct data processing and an indication of the weight coefficients of the classes inverse to the class power were tested (method 3). However, both options yielded worse results than equalizing class capacities, with the only the rather uninteresting exception of when neither “learning transfer” nor class weights were used.
     
    Thus, in the option described above where data is split into five-second intervals, the power of classes is aligned during training and using the “transfer learning” method becomes the best option.
     

    Sergey Kuznetsov is a software engineer at Auriga.
    Related Searches
    • Cardiovascular
    Related Knowledge Center
    • Cardiovascular
    Suggested For You
    FDA Breakthrough Device Designation Awarded to BrainCool AB FDA Breakthrough Device Designation Awarded to BrainCool AB's Cooral System
    FDA Green Lights EPI FDA Green Lights EPI's EndoClot Hemostat to Manage GI Bleeding
    Rice University Researchers Receive Funding to Develop Covid-19 Sensor System Rice University Researchers Receive Funding to Develop Covid-19 Sensor System
    Suitcase Laboratory to Detect COVID-19 in Development Suitcase Laboratory to Detect COVID-19 in Development
    First Use of SoundBite Medical First Use of SoundBite Medical's Active Wire to Treat Calcified Below-The-Knee CTOs
    FDA Clears 3D Acellular Dermal Matrix FDA Clears 3D Acellular Dermal Matrix
    Biotech Team Develops ELISA Protocol for COVID-19 Antibody Detection Biotech Team Develops ELISA Protocol for COVID-19 Antibody Detection
    Unique Contact Lens Sensor System & Manufacturing Process Developed Unique Contact Lens Sensor System & Manufacturing Process Developed
    Researchers Receive Funding to Develop Smart Vaccine Device Researchers Receive Funding to Develop Smart Vaccine Device
    Nanosilica Filled, Electrically Insulative Epoxy Features Abrasion Resistance Nanosilica Filled, Electrically Insulative Epoxy Features Abrasion Resistance
    Researchers Develop New Combined Process for 3D Printing Researchers Develop New Combined Process for 3D Printing
    Innovative Health Obtains Patent for Microlumen Reprocessing Technology Innovative Health Obtains Patent for Microlumen Reprocessing Technology
    CRISPR-Based COVID-19 Test Uses Smartphone Camera CRISPR-Based COVID-19 Test Uses Smartphone Camera
    Increasing Comfort for Chemotherapy Patients Increasing Comfort for Chemotherapy Patients
    The Big Challenges of Medical Device Miniaturization The Big Challenges of Medical Device Miniaturization

    Related Online Exclusives

    • Cardiovascular | Surgical
      Prospects of AIMDs in the Implantable Medical Device Industry

      Prospects of AIMDs in the Implantable Medical Device Industry

      Active implantable medical devices (AIMDs) are a significant player in the medical implant market.
      Sunil Jha, Research Content Developer, Global Market Insights 11.18.20

    • Cardiovascular
      Examining the State of the Pacemaker Industry

      Examining the State of the Pacemaker Industry

      The advent of FDA-cleared MRI pacemakers is a significant trend.
      Sunil Jha, Research Content Developer, Global Market Insights 02.21.20

    • Cardiovascular | Diagnostics | Patient Monitoring
      Ladies First: An Examination of the Women

      Ladies First: An Examination of the Women's Health Device Industry

      Economic burden for women's diseases tops $500 billion, but women’s health makes up about 4 percent of total R&D funding for healthcare products and services.
      Hrishikesh Kadam, Research Content Developer, Global Market Insights (GMI) 12.11.19


    • Cardiovascular
      Using ECG to Diagnose Cardiovascular Disease

      Using ECG to Diagnose Cardiovascular Disease

      How to turn raw data into results.
      Sergey Kuznetsov, Software Engineer, Auriga 10.16.19

    • Cardiovascular | Surgical
      CRM Device Demand Soars Amid Surging Cardiovascular Disease Prevalence

      CRM Device Demand Soars Amid Surging Cardiovascular Disease Prevalence

      Estimates claim the cardiac rhythm management industry's size to reach $13.7 billion by 2025.
      Paroma Bhattacharya, Research Content Developer, Global Market Insights 10.15.19

    • Cardiovascular | Digital Health | Software & IT | Surgical
      Gaming Through Surgery: Apps Prepare Clinicians for Challenging Cases

      Gaming Through Surgery: Apps Prepare Clinicians for Challenging Cases

      A video game app can be leveraged to introduce healthcare professionals to challenging procedures for a variety of clinical application areas.
      Sean Fenske, Editor-in-Chief 08.08.19


    • 3D/Additive Manufacturing | Cardiovascular
      3D Printing in the Medical Technology Industry: An Economic Case

      3D Printing in the Medical Technology Industry: An Economic Case

      A look at final part cost variables reveals additive manufacturing can be an efficient solution for many medtech applications, but only if approached correctly.
      Matt Sand, President, 3DEO 05.30.19

    • Cardiovascular | Contract Manufacturing | Electronics | Molding | Patient Monitoring
      Staying Dry: Waterproofing a Heart Monitor

      Staying Dry: Waterproofing a Heart Monitor

      Comar resolves market growth needs for the myPatch sl Holter recorder while enhancing design and addressing specific demands.
      Adrian Possumato, Principal Consultant, Medica Consulting 05.21.19

    • Cardiovascular
      Meeting Cardiac Stent Market Needs

      Meeting Cardiac Stent Market Needs

      Biotronik's PK Papyrus device was developed to provide physicians with a reliable covered stent that can be quickly deployed.
      Michael Barbella, Managing Editor 04.04.19


    • Cardiovascular
      Room for Improvement in Cardiac Stent Development

      Room for Improvement in Cardiac Stent Development

      Less-than-optimal outcomes will drive future growth in the global stent market.
      Michael Barbella, Managing Editor 03.29.19

    • Cardiovascular | Packaging & Sterilization | Surgical
      Why Does Medtech Rely on Metal Finishing?

      Why Does Medtech Rely on Metal Finishing?

      What is so important about using a metal finish, at least when it comes to cleanliness and sterilization?
      Megan Ray Nichols, Science Writer; Editor, Schooled By Science 03.20.19

    • Cardiovascular | Software & IT
      Special Considerations for Automatic Defibrillator Development and Algorithm Optimization

      Special Considerations for Automatic Defibrillator Development and Algorithm Optimization

      ...
      Alexander Naumov and Anastasia Lebedeva, Software Engineers, Auriga Inc. 02.28.19


    • Cardiovascular | Electronics | Surgical
      Reducing the Noise Impact of Medical Devices

      Reducing the Noise Impact of Medical Devices

      Diaphragm pumps can be particularly troublesome when it comes to unwanted noise in a point-of-care device.
      Jamie Campbell, Product Manager, Parker Precision Fluidics 01.07.19

    • Cardiovascular | Surgical | Tubing & Extrusion
      Film-Cast Tubing Specifications Used in Catheter-Based Medical Devices

      Film-Cast Tubing Specifications Used in Catheter-Based Medical Devices

      Film-cast tubing is not extruded tubing, so knowing the differences is critical for ensuring successful definition of its specifications.
      Brett Steen, Engineering Consultant 01.07.19

    • Cardiovascular | Neurological | Surgical
      The YouTube for Healthcare

      The YouTube for Healthcare

      VuMedi is a video platform that exclusively caters to medical professionals, physicians, and the healthcare industry.
      Sean Fenske, Editor-in-Chief 12.05.18


    Trending
    • FDA Breakthrough Device Designation Awarded To BrainCool AB's Cooral System
    • Mike On Medtech: Update On FDA's STeP Designation
    • Hardy Diagnostics Releases Rapid Test For COVID-19
    • Philips, Disney Join Forces To Reduce Childrens' MRI Anxiety
    • Quidel's QuickVue At-Home COVID-19 Test Earns EUA
    Breaking News
    • Plastikos Medical Begins Phase II of Expansion
    • Ready Robotics Hires Proven Automation Leaders
    • Philips, Disney Join Forces to Reduce Childrens' MRI Anxiety
    • FDA OKs Asensus' Senhance for General Surgery
    • Boston Scientific to Buy Lumenis' Surgical Biz for $1B
    View Breaking News >
    CURRENT ISSUE

    January/February 2021

    • Seeking a Revolution in Clinical Care Through AI
    • Diversifying Supply Chains: New Opportunities Post Pandemic and After Brexit
    • Addition by Subtraction: The Latest of Machining for Medtech
    • Innovation Incubators: An R&D Roundtable
    • Virtual Allies: Electronics Manufacturing Services Providers Offer Real Solutions
    • View More >

    Cookies help us to provide you with an excellent service. By using our website, you declare yourself in agreement with our use of cookies.
    You can obtain detailed information about the use of cookies on our website by clicking on "More information”.

    • About Us
    • Privacy Policy
    • Terms And Conditions
    • Contact Us

    follow us

    Subscribe
    Nutraceuticals World

    Latest Breaking News From Nutraceuticals World

    Preclinical Trial Suggests Fish Hydrolysate Attenuates Neuroinflammation Greater than DHA Alone
    Study Explains Link Between Probiotic Strains and Children’s Immune Health Benefits
    Maypro Launches Brain Heatlh Ingredient NeuroHD
    Coatings World

    Latest Breaking News From Coatings World

    Chromaflo Technologies Adds Benjamin Woeste as Territory Sales Manager
    Matt Fogel Named Mule-Hide's Territory Manager – Southern Virginia
    Benjamin Moore Launches COMMAND
    Medical Product Outsourcing

    Latest Breaking News From Medical Product Outsourcing

    Plastikos Medical Begins Phase II of Expansion
    Ready Robotics Hires Proven Automation Leaders
    Philips, Disney Join Forces to Reduce Childrens' MRI Anxiety
    Contract Pharma

    Latest Breaking News From Contract Pharma

    Innoforce and dMed Enter Development Collaboration
    Matica Biotechnology Breaks Ground on Cell and Gene Therapy Site
    Four Female Leaders Appointed to Cell & Gene CDMO
    Beauty Packaging

    Latest Breaking News From Beauty Packaging

    BizBash Names Unfiltered Experience ‘People's Choice: Best Influencer Event’
    P&G Makes Progress Toward Packaging Circularity in Europe
    Coty Partners with LanzaTech to Introduce Sustainable Ethanol
    Happi

    Latest Breaking News From Happi

    Coty Partners with LanzaTech to Reduce Its Environmental Impact
    Waterless Beauty, Simplified Routines Shape Clean Beauty at Whole Foods
    Redken Updates Packaging, Adds New Products
    Ink World

    Latest Breaking News From Ink World

    Massilly North America Adds Koenig & Bauer MetalStar 3 Metal Decorating Press
    Hydrocarbon Solvents Market to Surpass $8.1 Billion by 2030
    Access Direct Mail Doubles Revenue with SCREEN's Truepress Jet520HD
    Label & Narrow Web

    Latest Breaking News From Label & Narrow Web

    Fort Dearborn Company acquires Hammer Packaging
    Ashland announces PSA price hike in North America
    Arrow Systems and Sihl form flexible packaging partnership
    Nonwovens Industry

    Latest Breaking News From Nonwovens Industry

    Joa Announces Expandable Absorbent Core Wrap Solution
    Principle Business Enterprises Celebrates 60 Years
    Mann+Hummel Invests in Pamlico Air
    Orthopedic Design & Technology

    Latest Breaking News From Orthopedic Design & Technology

    Lincotek Medical Expands Coatings and Additive Capacity
    Spinal Elements Relaunches the Luna XD and Orbit Systems
    Coronavirus Triggers Double-Digit Revenue Dropoff at Smith+Nephew
    Printed Electronics Now

    Latest Breaking News From Printed Electronics Now

    Comercial Kywi Improves Customer Service, Front-Store Operations with Zebra Mobile Solution
    Global Printed Circuit Board Market Projected to Reach $69.32 Billion by 2027
    Global Smart Glass Market to Register 6.8% CAGR Between 2021-28: Grand View Research

    Copyright © 2021 Rodman Media. All rights reserved. Use of this constitutes acceptance of our privacy policy The material on this site may not be reproduced, distributed, transmitted, or otherwise used, except with the prior written permission of Rodman Media.

    AD BLOCKER DETECTED

    Our website is made possible by displaying online advertisements to our visitors.
    Please consider supporting us by disabling your ad blocker.


    FREE SUBSCRIPTION Already a subscriber? Login